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<title id="title">An Introduction to Electronics</title>
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<div id="main"><h1>Ohm's Law</h1>
<p>The relationship between the electrical current I, passing through a particular 
component in a circuit with a voltage difference across it V is defined by the Ohm's Law:</p>
<p><img alt="equation" class="block" src="http://bricefernandes.com/cgi-bin/mimetex.cgi?R=%5Cfrac{V}{I}"></img></p>
<p>where R is the resistance of the component with a voltage V. Resistance measured in Ohms (<img alt="equation" class="inline" src="http://bricefernandes.com/cgi-bin/mimetex.cgi?%5COmega"></img>).</p>
<p>Simple circuit, that represents Ohm's Law</p>
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<img alt="Ohm&apos;s Law" src="../resources/ohm.jpg" /></p>
<p>so if the voltage across the component is V=220V and current that flows in this circuit 
is I=2A then resistance of this component is </p>
<p><img alt="equation" class="block" src="http://bricefernandes.com/cgi-bin/mimetex.cgi?R=%5Cfrac{220V}{2A}=110 %5COmega"></img></p>
<p>The equation also can be rearranged to give Voltage (current) if other two parameters are known.</p></div>

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